add defaults for cicd
diff --git a/docker/swarm/service/visualizer.yml b/docker/swarm/service/visualizer.yml
index fe52c0b..8519363 100644
--- a/docker/swarm/service/visualizer.yml
+++ b/docker/swarm/service/visualizer.yml
@@ -1,11 +1,13 @@
 parameters:
+  _param:
+    docker_image_visualizer: manomarks/visualizer
   docker:
     client:
       service:
         visualizer:
           restart:
             condition: any
-          image: manomarks/visualizer
+          image: ${_param:docker_image_visualizer}
           constraint: "node.role==manager"
           ports:
             - 18090:8080